Adult San Esteban pinto chuckwalla (Sauromalus varius), endemic to Isla San Esteban, Baja California, Mexico, North America

Adult San Esteban pinto chuckwalla (Sauromalus varius), basking in the sun, Isla San Esteban, Baja California, Mexico, North America

Staff member from the Lindblad Expedition ship National Geographic Sea Bird holding an endemic pinto chuckwalla on Isla San Esteban, Mexico.

An adult San Esteban Island chuckwalla (Sauromalus varius) sunning itself on lava rock on Isla San Esteban, Gulf of California (Sea of Cortez), Baja California, Mexico